/* 类别选择器 */
.tech
{
    background-color: #e0f7e9;
}
.marketing
{
    background-color: #e3f2fd;
}
.hr
{
    background-color: #ffe0b2;
}
/* 限制和不限制的 ID 选择器 */
#special-employee
{
    border: 2px solid #8e24aa;
    background-color: #f5f5f5;
}
/* 后代选择器 */
.department-category .employee-card
{
    color: #424242;
    padding: 10px;
    border-bottom: 1px solid #e0e0e0
}
/* 并集选择器 */
.tech, .marketing
{
    font-family: Arial, sans-serif;
    line-height: 1.5;
}
/* 伪类选择器 */
.employee-card:hover
{
    background-color: #fff9c4;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2)
}
.employee-card:nth-child(even) 
{
    background-color: #f5f5f5;
}
/* 伪类与类别选择器组合 */
.high-rating:hover 
{
    color: #ffd700;
    font-weight: bold;
    text-decoration: underline;
}